7. Books
Selling books online will guarantee you a high revenue because unlike video games, for instance, they will always be popular. Of course, there are many new coming out all the time, but a person who loves to read could never have enough books regardless how old and unpopular they are. If you don’t know in which genre to invest, you can focus on a specific sex or age. For teenage girls, you can sell love novels while for teenage boys you can sell crime novels. Or, you can focus on a few authors like Sidney Sheldon or Agatha Christie. You may need some time to find out in what genre your customers are interested in, but after a few orders, you will know for sure what you should include in your offer.
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